Файловый менеджер

Файловый менеджер - Редактировать - /snap/core18/2846/usr/lib/python3/dist-packages/cloudinit/net/netplan.py

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# This file is part of cloud-init. See LICENSE file ... import copy import ipaddress import os import textwrap from typing import Optional, cast from cloudinit import features from cloudinit import log as logging from cloudinit import safeyaml, subp, util from cloudinit.net import ( IPV6_DYNAMIC_TYPES, SYS_CLASS_NET, get_devicelist, renderer, subnet_is_ipv6, ) from cloudinit.net.network_state import NET_CONFIG_TO_V2, NetworkState KNOWN_SNAPD_CONFIG = b"""\ # This is the initial network config. # It can be overwritten by cloud-init or console-conf. network: version: 2 ethernets: all-en: match: name: "en" dhcp4: true all-eth: match: name: "eth" dhcp4: true """ LOG = logging.getLogger(__name__) def _get_params_dict_by_match(config, match): return dict( (key, value) for (key, value) in config.items() if key.startswith(match) ) def _extract_addresses(config: dict, entry: dict, ifname, features=None): """This method parse a cloudinit.net.network_state dictionary (config) and maps netstate keys/values into a dictionary (entry) to represent netplan yaml. (config v1 -> netplan) An example config dictionary might look like: {'mac_address': '52:54:00:12:34:00', 'name': 'interface0', 'subnets': [ {'address': '192.168.1.2/24', 'mtu': 1501, 'type': 'static'}, {'address': '2001:4800:78ff:1b:be76:4eff:fe06:1000", 'mtu': 1480, 'netmask': 64, 'type': 'static'}], 'type: physical', 'accept-ra': 'true' } An entry dictionary looks like: {'set-name': 'interface0', 'match': {'macaddress': '52:54:00:12:34:00'}, 'mtu': 1501} After modification returns {'set-name': 'interface0', 'match': {'macaddress': '52:54:00:12:34:00'}, 'mtu': 1501, 'address': ['192.168.1.2/24', '2001:4800:78ff:1b:be76:4eff:fe06:1000"], 'ipv6-mtu': 1480} """ def _listify(obj, token=" "): """ Helper to convert strings to list of strings, handle single string """ if not obj or not isinstance(obj, str): return obj if token in obj: return obj.split(token) else: return [ obj, ] if features is None: features = [] addresses = [] routes = [] nameservers = [] searchdomains = [] subnets = config.get("subnets", []) if subnets is None: subnets = [] for subnet in subnets: sn_type = subnet.get("type") if sn_type.startswith("dhcp"): if sn_type == "dhcp": sn_type += "4" entry.update({sn_type: True}) elif sn_type in IPV6_DYNAMIC_TYPES: entry.update({"dhcp6": True}) elif sn_type in ["static", "static6"]: addr = "%s" % subnet.get("address") if "prefix" in subnet: addr += "/%d" % subnet.get("prefix") if subnet.get("gateway"): new_route = { "via": subnet.get("gateway"), "to": "::/0" if ":" in subnet["gateway"] else "0.0.0.0/0", } try: subnet_gateway = ipaddress.ip_address(subnet["gateway"]) subnet_network = ipaddress.ip_network(addr, strict=False) # If the gateway is not contained within the subnet's # network, mark it as on-link so that it can still be # reached. if subnet_gateway not in subnet_network: LOG.debug( "Gateway %s is not contained within subnet %s," " adding on-link flag", subnet["gateway"], addr, ) new_route["on-link"] = True except ValueError as e: LOG.warning( "Failed to check whether gateway %s" " is contained within subnet %s: %s", subnet["gateway"], addr, e, ) routes.append(new_route) if "dns_nameservers" in subnet: nameservers += _listify(subnet.get("dns_nameservers", [])) if "dns_search" in subnet: searchdomains += _listify(subnet.get("dns_search", [])) if "mtu" in subnet: mtukey = "mtu" if subnet_is_ipv6(subnet) and "ipv6-mtu" in features: mtukey = "ipv6-mtu" entry.update({mtukey: subnet.get("mtu")}) for route in subnet.get("routes", []): to_net = "%s/%s" % (route.get("network"), route.get("prefix")) new_route = { "via": route.get("gateway"), "to": to_net, } if "metric" in route: new_route.update({"metric": route.get("metric", 100)}) routes.append(new_route) addresses.append(addr) if "mtu" in config: entry_mtu = entry.get("mtu") if entry_mtu and config["mtu"] != entry_mtu: LOG.warning( "Network config: ignoring %s device-level mtu:%s because" " ipv4 subnet-level mtu:%s provided.", ifname, config["mtu"], entry_mtu, ) else: entry["mtu"] = config["mtu"] if len(addresses) > 0: entry.update({"addresses": addresses}) if len(routes) > 0: entry.update({"routes": routes}) if len(nameservers) > 0: ns = {"addresses": nameservers} entry.update({"nameservers": ns}) if len(searchdomains) > 0: ns = entry.get("nameservers", {}) ns.update({"search": searchdomains}) entry.update({"nameservers": ns}) if "accept-ra" in config and config["accept-ra"] is not None: entry.update({"accept-ra": util.is_true(config.get("accept-ra"))}) def _extract_bond_slaves_by_name(interfaces, entry, bond_master): bond_slave_names = sorted( [ name for (name, cfg) in interfaces.items() if cfg.get("bond-master", None) == bond_master ] ) if len(bond_slave_names) > 0: entry.update({"interfaces": bond_slave_names}) def _clean_default(target=None): # clean out any known default files and derived files in target # LP: #1675576 tpath = subp.target_path(target, "etc/netplan/00-snapd-config.yaml") if not os.path.isfile(tpath): return content = util.load_file(tpath, decode=False) if content != KNOWN_SNAPD_CONFIG: return derived = [ subp.target_path(target, f) for f in ( "run/systemd/network/10-netplan-all-en.network", "run/systemd/network/10-netplan-all-eth.network", "run/systemd/generator/netplan.stamp", ) ] existing = [f for f in derived if os.path.isfile(f)] LOG.debug( "removing known config '%s' and derived existing files: %s", tpath, existing, ) for f in [tpath] + existing: os.unlink(f) class Renderer(renderer.Renderer): """Renders network information in a /etc/netplan/network.yaml format.""" NETPLAN_GENERATE = ["netplan", "generate"] NETPLAN_INFO = ["netplan", "info"] def __init__(self, config=None): if not config: config = {} self.netplan_path = config.get( "netplan_path", "etc/netplan/50-cloud-init.yaml" ) self.netplan_header = config.get("netplan_header", None) self._postcmds = config.get("postcmds", False) self.clean_default = config.get("clean_default", True) self._features = config.get("features", None) @property def features(self): if self._features is None: try: info_blob, _err = subp.subp(self.NETPLAN_INFO, capture=True) info = util.load_yaml(info_blob) self._features = info["netplan.io"]["features"] except subp.ProcessExecutionError: # if the info subcommand is not present then we don't have any # new features pass except (TypeError, KeyError) as e: LOG.debug("Failed to list features from netplan info: %s", e) return self._features def render_network_state( self, network_state: NetworkState, templates: Optional[dict] = None, target=None, ) -> None: # check network state for version # if v2, then extract network_state.config # else render_v2_from_state fpnplan = os.path.join(subp.target_path(target), self.netplan_path) util.ensure_dir(os.path.dirname(fpnplan)) header = self.netplan_header if self.netplan_header else "" # render from state content = self._render_content(network_state) if not header.endswith("\n"): header += "\n" mode = 0o600 if features.NETPLAN_CONFIG_ROOT_READ_ONLY else 0o644 if os.path.exists(fpnplan): current_mode = util.get_permissions(fpnplan) if current_mode & mode == current_mode: # preserve mode if existing perms are more strict than default mode = current_mode util.write_file(fpnplan, header + content, mode=mode) if self.clean_default: _clean_default(target=target) self._netplan_generate(run=self._postcmds) self._net_setup_link(run=self._postcmds) def _netplan_generate(self, run=False): if not run: LOG.debug("netplan generate postcmd disabled") return subp.subp(self.NETPLAN_GENERATE, capture=True) def _net_setup_link(self, run=False): """To ensure device link properties are applied, we poke udev to re-evaluate networkd .link files and call the setup_link udev builtin command """ if not run: LOG.debug("netplan net_setup_link postcmd disabled") return setup_lnk = ["udevadm", "test-builtin", "net_setup_link"] # It's possible we can race a udev rename and attempt to run # net_setup_link on a device that no longer exists. When this happens, # we don't know what the device was renamed to, so re-gather the # entire list of devices and try again. last_exception = Exception for _ in range(5): try: for iface in get_devicelist(): if os.path.islink(SYS_CLASS_NET + iface): subp.subp( setup_lnk + [SYS_CLASS_NET + iface], capture=True ) break except subp.ProcessExecutionError as e: last_exception = e else: raise RuntimeError( "'udevadm test-builtin net_setup_link' unable to run " "successfully for all devices." ) from last_exception def _render_content(self, network_state: NetworkState) -> str: # if content already in netplan format, pass it back if network_state.version == 2: LOG.debug("V2 to V2 passthrough") return safeyaml.dumps( {"network": network_state.config}, explicit_start=False, explicit_end=False, ) ethernets = {} wifis: dict = {} bridges = {} bonds = {} vlans = {} content = [] interfaces = network_state._network_state.get("interfaces", []) nameservers = network_state.dns_nameservers searchdomains = network_state.dns_searchdomains for config in network_state.iter_interfaces(): ifname = config.get("name") # filter None (but not False) entries up front ifcfg = dict(filter(lambda it: it[1] is not None, config.items())) if_type = ifcfg.get("type") if if_type == "physical": # required_keys = ['name', 'mac_address'] eth = { "set-name": ifname, "match": ifcfg.get("match", None), } if eth["match"] is None: macaddr = ifcfg.get("mac_address", None) if macaddr is not None: eth["match"] = {"macaddress": macaddr.lower()} else: del eth["match"] del eth["set-name"] _extract_addresses(ifcfg, eth, ifname, self.features) ethernets.update({ifname: eth}) elif if_type == "bond": # required_keys = ['name', 'bond_interfaces'] bond = {} bond_config = {} # extract bond params and drop the bond_ prefix as it's # redundant in v2 yaml format v2_bond_map = cast(dict, NET_CONFIG_TO_V2.get("bond")) # Previous cast is needed to help mypy to know that the key is # present in `NET_CONFIG_TO_V2`. This could probably be removed # by using `Literal` when supported. for match in ["bond_", "bond-"]: bond_params = _get_params_dict_by_match(ifcfg, match) for (param, value) in bond_params.items(): newname = v2_bond_map.get(param.replace("_", "-")) if newname is None: continue bond_config.update({newname: value}) if len(bond_config) > 0: bond.update({"parameters": bond_config}) if ifcfg.get("mac_address"): bond["macaddress"] = ifcfg["mac_address"].lower() slave_interfaces = ifcfg.get("bond-slaves") if slave_interfaces == "none": _extract_bond_slaves_by_name(interfaces, bond, ifname) _extract_addresses(ifcfg, bond, ifname, self.features) bonds.update({ifname: bond}) elif if_type == "bridge": # required_keys = ['name', 'bridge_ports'] bridge_ports = ifcfg.get("bridge_ports") # mypy wrong error. `copy(None)` is supported: ports = sorted(copy.copy(bridge_ports)) # type: ignore bridge: dict = { "interfaces": ports, } # extract bridge params and drop the bridge prefix as it's # redundant in v2 yaml format match_prefix = "bridge_" params = _get_params_dict_by_match(ifcfg, match_prefix) br_config = {} # v2 yaml uses different names for the keys # and at least one value format change v2_bridge_map = cast(dict, NET_CONFIG_TO_V2.get("bridge")) # Previous cast is needed to help mypy to know that the key is # present in `NET_CONFIG_TO_V2`. This could probably be removed # by using `Literal` when supported. for (param, value) in params.items(): newname = v2_bridge_map.get(param) if newname is None: continue br_config.update({newname: value}) if newname in ["path-cost", "port-priority"]: # <interface> <value> -> <interface>: int(<value>) newvalue = {} for val in value: (port, portval) = val.split() newvalue[port] = int(portval) br_config.update({newname: newvalue}) if len(br_config) > 0: bridge.update({"parameters": br_config}) if ifcfg.get("mac_address"): bridge["macaddress"] = ifcfg["mac_address"].lower() _extract_addresses(ifcfg, bridge, ifname, self.features) bridges.update({ifname: bridge}) elif if_type == "vlan": # required_keys = ['name', 'vlan_id', 'vlan-raw-device'] vlan = { "id": ifcfg.get("vlan_id"), "link": ifcfg.get("vlan-raw-device"), } macaddr = ifcfg.get("mac_address", None) if macaddr is not None: vlan["macaddress"] = macaddr.lower() _extract_addresses(ifcfg, vlan, ifname, self.features) vlans.update({ifname: vlan}) # inject global nameserver values under each all interface which # has addresses and do not already have a DNS configuration if nameservers or searchdomains: nscfg = {"addresses": nameservers, "search": searchdomains} for section in [ethernets, wifis, bonds, bridges, vlans]: for _name, cfg in section.items(): if "nameservers" in cfg or "addresses" not in cfg: continue cfg.update({"nameservers": nscfg}) # workaround yaml dictionary key sorting when dumping def _render_section(name, section): if section: dump = safeyaml.dumps( {name: section}, explicit_start=False, explicit_end=False, noalias=True, ) txt = textwrap.indent(dump, " " * 4) return [txt] return [] content.append("network:\n version: 2\n") content += _render_section("ethernets", ethernets) content += _render_section("wifis", wifis) content += _render_section("bonds", bonds) content += _render_section("bridges", bridges) content += _render_section("vlans", vlans) return "".join(content) def available(target=None): expected = ["netplan"] search = ["/usr/sbin", "/sbin"] for p in expected: if not subp.which(p, search=search, target=target): return False return True def network_state_to_netplan(network_state, header=None): # render the provided network state, return a string of equivalent eni netplan_path = "etc/network/50-cloud-init.yaml" renderer = Renderer( { "netplan_path": netplan_path, "netplan_header": header, } ) if not header: header = "" if not header.endswith("\n"): header += "\n" contents = renderer._render_content(network_state) return header + contents # vi: ts=4 expandtab

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